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A319781 as a simple table

n a(n)
0 1
1 0
2 0
3 1
4 3
5 9
6 21
7 48
8 103
9 214
10 436
11 863
12 1689

[1,0,0,1,3,9,21,48,103,214,436,863,1689]

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Last modified April 19 19:02 EDT 2024. Contains 371798 sequences. (Running on oeis4.)